Document Type
Article
Publication Date
2-24-2006
Journal / Book Title
BMC Microbiology
Abstract
Background: It has been reported that some marine cyanophage are temperate and can be induced from a lysogenic phase to a lytic phase by different agents such as heavy metals. However, to date no significant reports have focused on the temperate nature of freshwater cyanophage/cyanobacteria. Previous experiments with cyanophage AS-1 and cyanobacteria Anacystis nidulans have provided some evidence that AS-1 may have a lysogenic life cycle in addition to the characterized lytic cycle. Results: In this study, the possible temperate A. nidulans was treated with different concentrations of heavy metal-copper. CuSO4 with concentrations of 3.1 × 10-3 M, 3.1 × 10-4 M, 3.1 × 10-5 M and 3.1 × 10 -6 M were used to detect the induction of AS-1 from A. nidulans. The population of the host, unicellular cyanobacteria Anacystis nidulans, was monitored by direct count and turbidity while the amount of virus produced was derived from plaque forming units (PFU) by a direct plating method. The ratio of AS-1 release from A. nidulans was also determined. From these results it appears that AS-1 lysogenic phage can be induced by copper at concentrations from 3.1 × 10-6 M to 3.1 × 10-4 M. Maximal phage induction occurred at 6 hours after addition of copper, with an optimal concentration of 3.1 × 10-6 M. Conclusion: Cu2+ is a significant inducer for lysogenic cyanobacterial cells and consequently would be a potential control agent in the cyanobacteria population in fresh water ecosystems. © 2006 Lee et al; licensee BioMed Central Ltd.
DOI
10.1186/1471-2180-6-17
Montclair State University Digital Commons Citation
Lee, Lee H.; Lui, Doris; Platner, Patricia J.; Hsu, Shi Fang; Chu, Tin Chun; Gaynor, John J.; Vega, Quinn C.; and Lustigman, Bonnie K., "Induction of temperate cyanophage AS-1 by heavy metal - Copper" (2006). Department of Biology Faculty Scholarship and Creative Works. 553.
https://digitalcommons.montclair.edu/biology-facpubs/553
Rights
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0)
Published Citation
Lee, L. H., Lui, D., Platner, P. J., Hsu, S. F., Chu, T. C., Gaynor, J. J., Vega, Q. C., & Lustigman, B. K. (2006). Induction of temperate cyanophage AS-1 by heavy metal--copper. BMC microbiology, 6, 17. https://doi.org/10.1186/1471-2180-6-17